Give the charge on the transition metal of each of the following compounds:

A. Au2SO4
B. Fe2(CrO4)3
C. Zn(OH)2


Enter your answer as +1, +2, etc.

Au
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Fe
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Zn
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Answer:

it moves faster when heated

Answer:

the answer is faster

Explanation:

why because water moves faster when heated

Explanation:

Time = Distnace ×speed

so distance is 2000m

and speed is 100

so 100×2000

time = 200000s

Answer:

[tex]Zn^{2+}[/tex]

Explanation:

Hello,

In this case, since metals tend to lose electrons, they usually become the cations when chemical compounds are formed so the other element should be negative to allow their interactions to take place.

In such a way, since oxygen is known to be negatively charged as -2 and their subscripts are both 1, we infer that the oxidation state of zinc is +2, therefore, it is written as an ion as follows:

[tex]Zn^{2+}[/tex]

Best regards.

Answer:

aluminum i think

Explanation:

Answer:

total mass divided by its total volume

Explanation:

Answer:

to compare the data she has got?

Answer:

D. Ar.

Explanation:

The electron configuration of the atom reflects how the electrons are distributed among the various atomic orbitals. Just as for neutral atoms, we use the Pauli exclusion principle and Hund’s rule in writing the ground-state electron configurations of cations and anions.

Ions formed from atoms of most representative elements have the noble-gas outer electron configuration of ns²np⁶. In the formation of a cation from the atom of a representative element, one or more electrons are removed from the highest occupied n shell. The electron configuration of calcium and its ion is as follows:

Ca: [Ar]4s²                           Ca²⁺ : [Ar]

Answer:

2.787088m^2

Explanation:

well you multiply both numbers and then since its multiplication you can add both variables and there two

The steps for solving: 0.8102m x 3.44m is given below in explanation part, and the answer for this is [tex]2.788088m^2[/tex].

To begin solving the 0.8102m multiplied by 3.44m multiplication issue, multiply the numerical numbers together: 0.8102 x 3.44 = 2.788088.

Then add the units together: m x m = [tex]m^2[/tex]. Finally, add the numerical value and unit to get the following result: 2.788088 [tex]m^2[/tex].

We are multiplying two measures by metres (m) in this computation. When we multiply the numerical values, we get the product, and when we multiply the units, we get the final unit, which in this case is metres squared ( [tex]m^2[/tex]).

Thus, this signifies that the multiplication reflects a computation of area. The final value, 2.788088 [tex]m^2[/tex], is the product of multiplying the two measures supplied.

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Answer:

CH3CH2NH3+/CH3CH2NH2 would have the largest pKa

Explanation:

To answer this question we must know Kb of CH3CH2NH2 is 5.6x10⁻⁴, and for C6H5NH2 is 4.0x10⁻¹⁰. And the CH3CH2NH3+ and C6H5NH3+ are related with these substances because are their conjugate base. That means:

pKa of  CH3CH2NH3+ =  CH3CH2NH2;  C6H5NH3+ =  C6H5NH2

Also, Kw / Kb = Ka

Thus:

pKa of CH3CH2NH3+/CH3CH2NH2 is:

Kw / kb = Ka = 1.79x10⁻¹¹

-log Ka = pKa

pKa = 10.75

pKa of C6H5NH3+/ C6H5NH2 is:

Kw / kb = Ka = 2.5x10⁻⁵

-log Ka = pKa

pKa = 4.6

That means CH3CH2NH3+/CH3CH2NH2 would have the largest pKa

Answer: See below

Explanation:

In this problem, conversion factors are very important. In the second conversion, you wrote 1 kg=0.001 g. This is incorrect. It should be 1 kg=1000g. Otherwise, the rest is correct. Make sure to have correct conversions. The answer will be correct.

Answer:

measurement of the equilibrium concentration of an acidic product via titration with a strong base

Explanation:

The rate at which a reaction proceeds refers to how quickly the reaction is occuring. In other words, it is how quickly the reactants are changing to the products. According to the question, the rate of a reaction can be measured experimentally using the reactants' or products' properties e.g volume, pressure etc.

Since reactions must involve reactants and products, the manner in which either the reactants or products changes over time can be measured. For example; measurement of the absorbance of a colored reactant or product with time, measurement of the change in the partial pressure of a gas-phase reactant or product over time can be used.

However, a measurement of the equilibrium concentration of an acidic product via titration with a strong base will not tell us how fast the reaction is going because it is in an EQUILIBRIUM state i.e. reaction is occuring at an equal rate

Answer:

Image result for how do you convert wavelength to frequency?

How do you calculate energy from wavelength?

Convert your wavelength into meters.

Divide the speed of light, ~300,000,000 m/s, by the wavelength in m. This gives you the wave's frequency.

Multiply the frequency by Planck's constant, 6.626 x 10-34. The result is the waves energy in joules (J).

Explanation:

Answer:

1.  31.25 mL

2.  1.98 g/L

3.  0.45 g/mL

Explanation:

For each of the problems, you need to perform unit conversions.  You need to use the information given to you to convert to a specific unit.

1.  You need volume (mL).  You have density (g/mL) and mass (g).  Divide mass by density.  You will cancel out mL and be left with g.

(50.0 g)/(1.60 g/mL) = 31.25 mL

2.  You are given grams and liters.  You need to find density with units g/L.  This means that you have to divide grams by liters.

(0.891 g)/(0.450 L) = 1.98 g/L

3.  You have to find density again but this time with units g/mL.  Divide the given mass by the volume.

(10.0 g)/(22.0 mL) = 0.45 g/mL

Answer:

37.1 g of Arsenic

Explanation:

2.98 x 10^21 atoms of Arsenic x 74.92g/6.02 x 10^23

= 223.26 x 10^21/6.02 x 10^23

= 2.2326 x 10^23/6.02 x 10^23

= 37.1 g of Arsenic

Answer:

Pressure will stay the same if volume stays the same.

Answer:

Volume is inversely proportional to pressure, meaning if one goes up the other goes down and vise-versa. With volume remaining the same and there are no other given factors, pressure also remains the same

Answer:

compound

Explanation:

MgO is an inorganic compund :) The simplest explanation is that it's not an element b/c there's two elements (Mg & O) in the substance, and it's not a mixture b/c you can't easily separate the two elements.

Answer:

magnesium when magnesium is burnt by heat it forms an compound called magnesium oxide

Answer: The Answer Is D, He described light as little packets called photons.

Explanation:

The contribution of Albert Einstein to our understanding of the photoelectric effect is he described light as little packets called photons. The correct option is D.

The theory of relativity, which Albert Einstein developed and is rightfully famous for, transformed our understanding of space, time, gravity, and the cosmos.

Along with his work on relativity, the physicist established the scientific principles behind items like paper towels, lasers, and other everyday items.

Since Einstein first suggested using the use of light quanta to clarify the photoelectric impact, quantum theory accurately portrays the photoelectric impact. The quantum theory of radiation gives this concept a formal formulation.

Therefore, the correct option is D. He described light as little packets called photons.

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Answer:

Explanation:

Oleic acid originates from an unsaturated fatty acid with 18 carbon atoms and one double bond, which can be found in olive oil and many other vegetable and animal oils and fats. Its economic importance includes the production of soap making and cosmetics etc.

The line-bond structure of the given oleic acid in the question can be found in the attached below.

The line-bond structure of oleic acid is given in the image attached. The line-bond structure represents the number of carbon atoms.

Oleic acid is an omega-9 fatty acid. It can be made by the body. It is also found in foods. Highest levels are found in olive oil and other edible oils. Oleic acid is most commonly used for preventing heart disease and reducing cholesterol. It is long chain of 18 Carbon atoms.

It is found in oils such as olive, palm, peanut, and sunflower.

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Answer:

banking and railroads

Explanation:

The  two most common industries of the business leaders on this list are banking and railroads.

Industry is a group of productive enterprises or organizations that produce or supply goods, services, or sources of income. In economics, industries are generally classified as primary, secondary, tertiary, and quaternary; secondary industries are further classified as heavy and light.

Primary industry sector of a nation’s economy includes agriculture, forestry, fishing, mining, quarrying, and the extraction of minerals. It may be divided into two categories: genetic industry, including the production of raw materials that may be increased by human intervention in the production process; and extractive industry, including the production of exhaustible raw materials that cannot be augmented through cultivation.

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Answer:

Density, d = 1.779 g/cm³

Explanation:

The density of a material is given by its mass per unit volume.

Here, height of a piece of magnesium cylinder, h = 5.62 cm

Its diameter, d = 1.34 cm

Radius = 0.67 cm

Volume of he cylinder,

[tex]V=\pi r^2 h\\\\\text{Putting the value of r and h, we get :}\\\\V=(\pi \times (0.67)^2\times 5.62)\ cm^3[/tex]

[tex]d=\dfrac{m}{V}\\\\d=\dfrac{14.1\ g}{(\pi \times (0.67)^2\times 5.62)\ cm^3}\\\\d=1.779\ g/cm^3[/tex]

So, the density of the sample is 1.779 g/cm³.

The correct answer is 1030 km

Explanation:

The distance a body such as a submarine travels depends on two main variables the time of the movement and the speed. Indeed, to calculate the distance it is possible to use the formula d = s x t. The process to calculate the distance of the submarine journey is shown below:

Distance in the first part of the journey:

It is known during the first part of the journey the submarine traveled 5 hours at a speed of 106 km/h

Distance = speed × time

D = 106 km/h × 5 h

D = 530 km

Distance in the second part of the journey:

During the remaining 4 hours (the first part took 5 hours and the total time traveled were 9 hours) the speed was 125km/h. Now, let's calculate the distance covered during this part of the journey

Distance = speed × time

D= 125 km/h × 4 h

D= 500 km

Total distance:

Finally, add both distances to know the total distance

530 km + 500 km = 1030 km

Answer:

C Qualitative Analysis.

Explanation:

Answer:

0.027 ml

Explanation:

[tex]1\:cl = 10\:ml\\0.0027 \: cl = x\:ml[/tex]

Cross Multiply

[tex]x = 0.027 \:ml[/tex]

Answer:

NO

Explanation:

It would be difficult to plot a line of best fit on the scattered graph of the activities of metal blocks as the activities would almost be the same horizontally on the graph and an attempt to draw/determine an intercept will be almost impossible.  The line of best fit is usually drawn to determine the relatedness/correlation of the variables.

Drawing intercept for the activities of the liquid is easier because a line of best fit can be easily placed between the clustered liquid activities on the scattered plot.

Answer:

c.) true, because nonmetal atoms always form anions of a single , specific charge

Answer:

adding more water to the container

Explanation: because it would cause it to soak up the fluid to created a substance again

Answer:

adding more water to the container and iflamates the cells

Explanation:

Answer:

Yes, it is possible.

Explanation:

A diprotic acid is an acid that can release two protons. That's why it is called diprotic.

Monoprotic → Release one proton, for example Formic acid HCOOH

Triprotic → Releases three protons, for example H₃PO₄

Polyprotic → Release many protons, for example EDTA

it is a weak acid.

In the first equilibrum, it release proton, and the second is released in the second equilibrium. So the first equilibrium will have a Ka1

H₂A  +  H₂O  ⇄  H₃O⁺  +  HA⁻                Ka₁

HA⁻  +  H₂O  ⇄  H₃O⁺  +  A⁻²               Ka₂

The HA⁻ will work as an amphoterous because, it can be a base or an acid, according to this:

HA⁻   +  H₂O  ⇄  H₃O⁺   + A⁻²      Ka₂

HA⁻   +  H₂O  ⇄  OH⁻   + H₂A       Kb₂

Answer:

concentration of diluted solution = 0.0125 ( ± 0.0002)M

Uncertainty = ± 0.0002  

Explanation:

Given that

Initial volume of Cu2+ = 4.00 (±0.01) mL

Initial molarity 0f Cu2+ = 0.302 (±0.004) M

transferred to  100.00 (±0.08) Class A volumetric flask

first we get amount of water added

100.00 (±0.08) - 4.00 (±0.01)  = 96 ± (0.09)

Now according to  law of dilution

The concentration of Cu2+ after adding water

M1V1 = M2V2

we substitute

0.302 (±0.004) * 4.00 (±0.01) = x * 96 ± (0.09)

Now the multiplication of two digits with uncertainty is

(0.004/0.302) * 100 =  1.32% ;    (0.01/4.00) * 100 = 0.25%

= [0.302 ( ± 1.32% )] * [ 4.00 ± (0.25%)]

= 1.208 ±(1.57%)

1.57/100 * 1.208 = 0.0189

so

= (1.208 ± 0.0189)

now substitute in our previous equation

1.208 ± (0.0189) = x * 96 ± (0.09)

x = 1.208 ± (0.0189) / 96 ± (0.09)

{ 0.09/96 * 100 = 0.094% }

so x = 1.208 ± (1.57%) / 96 ± (0.094% )  

x = 0.0125 ± ( 1.664)

now( 1.664/100 * 0.0125)

= ± 0.000208

Hence

concentration of diluted solution = 0.0125 ( ± 0.0002)M

Uncertainty = ± 0.0002